python 生成并下载文件-后端

txt文件

生成并下载txt文件：

@app.route('/download', methods=['GET'])
def download():
    content = "long text"
    response = make_response(content)
    response.headers["Content-Disposition"] = "attachment;     
    filename=myfilename.txt"
    return response

运行app.py后，在浏览器中输入：http://127.0.0.1:5000/download，直接下载txt文件。

 

excel 文件

生成并下载excel 文件：

@app.route("/export",methods = ['GET'])
def export():
    out = BytesIO()
    workbook = xlsxwriter.Workbook(out)
    table = workbook.add_worksheet()
    table.write(0, 0, "第1列")
    table.write(0, 1, "第2列")
    table.write(0, 2, "第3列")
    table.write(0, 0, "name")
    table.write(1, 1, "sex")
    table.write(2, 2, "class")
    workbook.close()
    out.seek(0)
    filename = quote("Entity类下载.xlsx")
    rv = send_file(out, as_attachment=True, attachment_filename=filename)
    rv.headers['Content-Disposition'] += "; filename*=utf-8''{}".format(filename)
    return rv

运行app.py后，在浏览器中输入：http://127.0.0.1:5000/export，可以直接下载excel文件。

 

前后端分离时，接口返回时要注意headers　

def exportExcel():
    workbook = xlwt.Workbook(encoding='utf-8')
    wSheet = workbook.add_sheet("Plan")
    titleFont = xlwt.Font()
    f = BytesIO()
    workbook.save(f)
    f.seek(0)
    filename = quote(saveFile)  # 将单个字符串编码转化为 %xx%xx 的形式
    rv = send_file(f, as_attachment=True, attachment_filename=filename)
    rv.headers['Content-Disposition'] += "; filename*=utf-8''{}".format(filename)
    rv.headers['Cache-Control'] = 'no-store'            # 重点在这句！！！！！！！！！！！！！！！！！

    return rv